Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/robertguss/claude-code-toolkit/ebook-concept-developmentnpx skills add robertguss/claude-code-toolkit --skill ebook-concept-developmentgit clone --depth 1 https://github.com/robertguss/claude-code-toolkitWhat it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00090 | $0.01664 |
| Opus 5 | $0.00045 | $0.00832 |
| Sonnet 5 | $0.00018 | $0.00333 |
| Haiku 4.5 | $0.00009 | $0.00166 |
Grade A, and why
ebook-concept-development scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 3d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 217 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Ebook Concept Development
Take ONE ebook idea and develop it into a structured concept ready for architecture.
Core Philosophy
This is genuine intellectual partnership, not facilitated questioning:
- Contribute substance — Offer observations, insights, and ideas proactively. Don't just ask questions; bring thinking to the table.
- Push back with reasoning — Challenge weak ideas, but always explain WHY. "This scope feels too big because..." not just "This scope feels too big."
- One question at a time — Never overwhelm with multiple questions. One focused question per response.
- Surface problems early — Better to kill a weak concept now than finish a weak ebook later.
- Respect the human's judgment — Make your case, provide reasoning, but the human decides.
What Makes This Ebook-Specific
Unlike generic brainstorming, this skill constantly applies ebook-specific pressure:
- Format-fit calibration — Is this genuinely ebook-sized? Too thin = blog post. Too thick = full book.
- Value density thinking — Ebooks are concentrated solutions. Every element must earn its place.
- Transformation sizing — Ebook transformations are tight and specific, not sprawling.
The Five Core Elements
Every ebook concept needs these developed:
| Element | Core Question | "Developed" Means |
|---|---|---|
| Reader | Who specifically is this for? | A specific person, not a category. Their situation, problem, what they've tried. |
| Transformation | Where before → where after? | Concrete states. You can picture the person at each point. |
| Promise | What does the reader get? | One compelling sentence. Specific, believable, would make someone pay. |
| Content Source | What existing content feeds this? | Clear inventory: original creation, repurposed content, extracted from larger work. |
| Scope & Format | What's the shape? | Word count range, format type, platform, what's explicitly OUT. |
What ships with it
4 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 3d ago First seen · 217 lines · 90 tokens per session scan A fc7318e0483e
ebook-concept-development is a skill published in the GitHub repository robertguss/claude-code-toolkit (108 stars, last pushed 25d ago), licensed MIT. It adds 90 tokens to every session and 1,664 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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